Layer.cpp revision e44d21a247aac5192b8ef397d433a4aefb6ba53e
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <stdlib.h> 18#include <stdint.h> 19#include <sys/types.h> 20 21#include <cutils/properties.h> 22#include <cutils/native_handle.h> 23 24#include <utils/Errors.h> 25#include <utils/Log.h> 26#include <utils/StopWatch.h> 27 28#include <ui/GraphicBuffer.h> 29#include <ui/PixelFormat.h> 30 31#include <surfaceflinger/Surface.h> 32 33#include "clz.h" 34#include "GLExtensions.h" 35#include "Layer.h" 36#include "SurfaceFlinger.h" 37#include "DisplayHardware/DisplayHardware.h" 38#include "DisplayHardware/HWComposer.h" 39 40 41#define DEBUG_RESIZE 0 42 43 44namespace android { 45 46template <typename T> inline T min(T a, T b) { 47 return a<b ? a : b; 48} 49 50// --------------------------------------------------------------------------- 51 52Layer::Layer(SurfaceFlinger* flinger, 53 DisplayID display, const sp<Client>& client) 54 : LayerBaseClient(flinger, display, client), 55 mGLExtensions(GLExtensions::getInstance()), 56 mNeedsBlending(true), 57 mNeedsDithering(false), 58 mSecure(false), 59 mTextureManager(), 60 mBufferManager(mTextureManager), 61 mWidth(0), mHeight(0), mFixedSize(false) 62{ 63} 64 65Layer::~Layer() 66{ 67 // FIXME: must be called from the main UI thread 68 EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); 69 mBufferManager.destroy(dpy); 70 71 // we can use getUserClientUnsafe here because we know we're 72 // single-threaded at that point. 73 sp<UserClient> ourClient(mUserClientRef.getUserClientUnsafe()); 74 if (ourClient != 0) { 75 ourClient->detachLayer(this); 76 } 77} 78 79status_t Layer::setToken(const sp<UserClient>& userClient, 80 SharedClient* sharedClient, int32_t token) 81{ 82 sp<SharedBufferServer> lcblk = new SharedBufferServer( 83 sharedClient, token, mBufferManager.getDefaultBufferCount(), 84 getIdentity()); 85 86 status_t err = mUserClientRef.setToken(userClient, lcblk, token); 87 88 LOGE_IF(err != NO_ERROR, 89 "ClientRef::setToken(%p, %p, %u) failed", 90 userClient.get(), lcblk.get(), token); 91 92 if (err == NO_ERROR) { 93 // we need to free the buffers associated with this surface 94 } 95 96 return err; 97} 98 99int32_t Layer::getToken() const 100{ 101 return mUserClientRef.getToken(); 102} 103 104sp<UserClient> Layer::getClient() const 105{ 106 return mUserClientRef.getClient(); 107} 108 109// called with SurfaceFlinger::mStateLock as soon as the layer is entered 110// in the purgatory list 111void Layer::onRemoved() 112{ 113 ClientRef::Access sharedClient(mUserClientRef); 114 SharedBufferServer* lcblk(sharedClient.get()); 115 if (lcblk) { 116 // wake up the condition 117 lcblk->setStatus(NO_INIT); 118 } 119} 120 121sp<LayerBaseClient::Surface> Layer::createSurface() const 122{ 123 return mSurface; 124} 125 126status_t Layer::ditch() 127{ 128 // NOTE: Called from the main UI thread 129 130 // the layer is not on screen anymore. free as much resources as possible 131 mFreezeLock.clear(); 132 133 EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); 134 mBufferManager.destroy(dpy); 135 mSurface.clear(); 136 137 Mutex::Autolock _l(mLock); 138 mWidth = mHeight = 0; 139 return NO_ERROR; 140} 141 142status_t Layer::setBuffers( uint32_t w, uint32_t h, 143 PixelFormat format, uint32_t flags) 144{ 145 // this surfaces pixel format 146 PixelFormatInfo info; 147 status_t err = getPixelFormatInfo(format, &info); 148 if (err) return err; 149 150 // the display's pixel format 151 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 152 uint32_t const maxSurfaceDims = min( 153 hw.getMaxTextureSize(), hw.getMaxViewportDims()); 154 155 // never allow a surface larger than what our underlying GL implementation 156 // can handle. 157 if ((uint32_t(w)>maxSurfaceDims) || (uint32_t(h)>maxSurfaceDims)) { 158 return BAD_VALUE; 159 } 160 161 PixelFormatInfo displayInfo; 162 getPixelFormatInfo(hw.getFormat(), &displayInfo); 163 const uint32_t hwFlags = hw.getFlags(); 164 165 mFormat = format; 166 mWidth = w; 167 mHeight = h; 168 169 mReqFormat = format; 170 mReqWidth = w; 171 mReqHeight = h; 172 173 mSecure = (flags & ISurfaceComposer::eSecure) ? true : false; 174 mNeedsBlending = (info.h_alpha - info.l_alpha) > 0; 175 176 // we use the red index 177 int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED); 178 int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED); 179 mNeedsDithering = layerRedsize > displayRedSize; 180 181 mSurface = new SurfaceLayer(mFlinger, this); 182 return NO_ERROR; 183} 184 185void Layer::setGeometry(hwc_layer_t* hwcl) 186{ 187 hwcl->compositionType = HWC_FRAMEBUFFER; 188 hwcl->hints = 0; 189 hwcl->flags = 0; 190 hwcl->transform = 0; 191 hwcl->blending = HWC_BLENDING_NONE; 192 193 // we can't do alpha-fade with the hwc HAL 194 const State& s(drawingState()); 195 if (s.alpha < 0xFF) { 196 hwcl->flags = HWC_SKIP_LAYER; 197 return; 198 } 199 200 // we can only handle simple transformation 201 if (mOrientation & Transform::ROT_INVALID) { 202 hwcl->flags = HWC_SKIP_LAYER; 203 return; 204 } 205 206 hwcl->transform = mOrientation; 207 208 if (needsBlending()) { 209 hwcl->blending = mPremultipliedAlpha ? 210 HWC_BLENDING_PREMULT : HWC_BLENDING_COVERAGE; 211 } 212 213 hwcl->displayFrame.left = mTransformedBounds.left; 214 hwcl->displayFrame.top = mTransformedBounds.top; 215 hwcl->displayFrame.right = mTransformedBounds.right; 216 hwcl->displayFrame.bottom = mTransformedBounds.bottom; 217 218 hwcl->visibleRegionScreen.rects = 219 reinterpret_cast<hwc_rect_t const *>( 220 visibleRegionScreen.getArray( 221 &hwcl->visibleRegionScreen.numRects)); 222} 223 224void Layer::setPerFrameData(hwc_layer_t* hwcl) { 225 sp<GraphicBuffer> buffer(mBufferManager.getActiveBuffer()); 226 if (buffer == NULL) { 227 // this situation can happen if we ran out of memory for instance. 228 // not much we can do. continue to use whatever texture was bound 229 // to this context. 230 hwcl->handle = NULL; 231 return; 232 } 233 hwcl->handle = const_cast<native_handle_t*>(buffer->handle); 234 // TODO: set the crop value properly 235 hwcl->sourceCrop.left = 0; 236 hwcl->sourceCrop.top = 0; 237 hwcl->sourceCrop.right = buffer->width; 238 hwcl->sourceCrop.bottom = buffer->height; 239} 240 241void Layer::reloadTexture(const Region& dirty) 242{ 243 sp<GraphicBuffer> buffer(mBufferManager.getActiveBuffer()); 244 if (buffer == NULL) { 245 // this situation can happen if we ran out of memory for instance. 246 // not much we can do. continue to use whatever texture was bound 247 // to this context. 248 return; 249 } 250 251 if (mGLExtensions.haveDirectTexture()) { 252 EGLDisplay dpy(mFlinger->graphicPlane(0).getEGLDisplay()); 253 if (mBufferManager.initEglImage(dpy, buffer) != NO_ERROR) { 254 // not sure what we can do here... 255 goto slowpath; 256 } 257 } else { 258slowpath: 259 GGLSurface t; 260 if (buffer->usage & GRALLOC_USAGE_SW_READ_MASK) { 261 status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_OFTEN); 262 LOGE_IF(res, "error %d (%s) locking buffer %p", 263 res, strerror(res), buffer.get()); 264 if (res == NO_ERROR) { 265 mBufferManager.loadTexture(dirty, t); 266 buffer->unlock(); 267 } 268 } else { 269 // we can't do anything 270 } 271 } 272} 273 274void Layer::onDraw(const Region& clip) const 275{ 276 Texture tex(mBufferManager.getActiveTexture()); 277 if (tex.name == -1LU) { 278 // the texture has not been created yet, this Layer has 279 // in fact never been drawn into. This happens frequently with 280 // SurfaceView because the WindowManager can't know when the client 281 // has drawn the first time. 282 283 // If there is nothing under us, we paint the screen in black, otherwise 284 // we just skip this update. 285 286 // figure out if there is something below us 287 Region under; 288 const SurfaceFlinger::LayerVector& drawingLayers(mFlinger->mDrawingState.layersSortedByZ); 289 const size_t count = drawingLayers.size(); 290 for (size_t i=0 ; i<count ; ++i) { 291 const sp<LayerBase>& layer(drawingLayers[i]); 292 if (layer.get() == static_cast<LayerBase const*>(this)) 293 break; 294 under.orSelf(layer->visibleRegionScreen); 295 } 296 // if not everything below us is covered, we plug the holes! 297 Region holes(clip.subtract(under)); 298 if (!holes.isEmpty()) { 299 clearWithOpenGL(holes, 0, 0, 0, 1); 300 } 301 return; 302 } 303 drawWithOpenGL(clip, tex); 304} 305 306bool Layer::needsFiltering() const 307{ 308 if (!(mFlags & DisplayHardware::SLOW_CONFIG)) { 309 // NOTE: there is a race here, because mFixedSize is updated in a 310 // binder transaction. however, it doesn't really matter since it is 311 // evaluated each time we draw. To be perfectly correct, this flag 312 // would have to be associated with a buffer. 313 if (mFixedSize) 314 return true; 315 } 316 return LayerBase::needsFiltering(); 317} 318 319 320status_t Layer::setBufferCount(int bufferCount) 321{ 322 ClientRef::Access sharedClient(mUserClientRef); 323 SharedBufferServer* lcblk(sharedClient.get()); 324 if (!lcblk) { 325 // oops, the client is already gone 326 return DEAD_OBJECT; 327 } 328 329 // NOTE: lcblk->resize() is protected by an internal lock 330 status_t err = lcblk->resize(bufferCount); 331 if (err == NO_ERROR) 332 mBufferManager.resize(bufferCount); 333 334 return err; 335} 336 337sp<GraphicBuffer> Layer::requestBuffer(int index, 338 uint32_t reqWidth, uint32_t reqHeight, uint32_t reqFormat, 339 uint32_t usage) 340{ 341 sp<GraphicBuffer> buffer; 342 343 if (int32_t(reqWidth | reqHeight | reqFormat) < 0) 344 return buffer; 345 346 if ((!reqWidth && reqHeight) || (reqWidth && !reqHeight)) 347 return buffer; 348 349 // this ensures our client doesn't go away while we're accessing 350 // the shared area. 351 ClientRef::Access sharedClient(mUserClientRef); 352 SharedBufferServer* lcblk(sharedClient.get()); 353 if (!lcblk) { 354 // oops, the client is already gone 355 return buffer; 356 } 357 358 /* 359 * This is called from the client's Surface::dequeue(). This can happen 360 * at any time, especially while we're in the middle of using the 361 * buffer 'index' as our front buffer. 362 */ 363 364 status_t err = NO_ERROR; 365 uint32_t w, h, f; 366 { // scope for the lock 367 Mutex::Autolock _l(mLock); 368 369 // zero means default 370 const bool fixedSize = reqWidth && reqHeight; 371 if (!reqFormat) reqFormat = mFormat; 372 if (!reqWidth) reqWidth = mWidth; 373 if (!reqHeight) reqHeight = mHeight; 374 375 w = reqWidth; 376 h = reqHeight; 377 f = reqFormat; 378 379 if ((reqWidth != mReqWidth) || (reqHeight != mReqHeight) || 380 (reqFormat != mReqFormat)) { 381 mReqWidth = reqWidth; 382 mReqHeight = reqHeight; 383 mReqFormat = reqFormat; 384 mFixedSize = fixedSize; 385 386 lcblk->reallocateAllExcept(index); 387 } 388 } 389 390 // here we have to reallocate a new buffer because the buffer could be 391 // used as the front buffer, or by a client in our process 392 // (eg: status bar), and we can't release the handle under its feet. 393 const uint32_t effectiveUsage = getEffectiveUsage(usage); 394 buffer = new GraphicBuffer(w, h, f, effectiveUsage); 395 err = buffer->initCheck(); 396 397 if (err || buffer->handle == 0) { 398 LOGE_IF(err || buffer->handle == 0, 399 "Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d failed (%s)", 400 this, index, w, h, strerror(-err)); 401 } else { 402 LOGD_IF(DEBUG_RESIZE, 403 "Layer::requestBuffer(this=%p), index=%d, w=%d, h=%d, handle=%p", 404 this, index, w, h, buffer->handle); 405 } 406 407 if (err == NO_ERROR && buffer->handle != 0) { 408 Mutex::Autolock _l(mLock); 409 mBufferManager.attachBuffer(index, buffer); 410 } 411 return buffer; 412} 413 414uint32_t Layer::getEffectiveUsage(uint32_t usage) const 415{ 416 /* 417 * buffers used for software rendering, but h/w composition 418 * are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE 419 * 420 * buffers used for h/w rendering and h/w composition 421 * are allocated with HW_RENDER | HW_TEXTURE 422 * 423 * buffers used with h/w rendering and either NPOT or no egl_image_ext 424 * are allocated with SW_READ_RARELY | HW_RENDER 425 * 426 */ 427 428 if (mSecure) { 429 // secure buffer, don't store it into the GPU 430 usage = GraphicBuffer::USAGE_SW_READ_OFTEN | 431 GraphicBuffer::USAGE_SW_WRITE_OFTEN; 432 } else { 433 // it's allowed to modify the usage flags here, but generally 434 // the requested flags should be honored. 435 // request EGLImage for all buffers 436 usage |= GraphicBuffer::USAGE_HW_TEXTURE; 437 } 438 return usage; 439} 440 441uint32_t Layer::doTransaction(uint32_t flags) 442{ 443 const Layer::State& front(drawingState()); 444 const Layer::State& temp(currentState()); 445 446 const bool sizeChanged = (front.requested_w != temp.requested_w) || 447 (front.requested_h != temp.requested_h); 448 449 if (sizeChanged) { 450 // the size changed, we need to ask our client to request a new buffer 451 LOGD_IF(DEBUG_RESIZE, 452 "resize (layer=%p), requested (%dx%d), drawing (%d,%d)", 453 this, 454 int(temp.requested_w), int(temp.requested_h), 455 int(front.requested_w), int(front.requested_h)); 456 457 if (!isFixedSize()) { 458 // we're being resized and there is a freeze display request, 459 // acquire a freeze lock, so that the screen stays put 460 // until we've redrawn at the new size; this is to avoid 461 // glitches upon orientation changes. 462 if (mFlinger->hasFreezeRequest()) { 463 // if the surface is hidden, don't try to acquire the 464 // freeze lock, since hidden surfaces may never redraw 465 if (!(front.flags & ISurfaceComposer::eLayerHidden)) { 466 mFreezeLock = mFlinger->getFreezeLock(); 467 } 468 } 469 470 // this will make sure LayerBase::doTransaction doesn't update 471 // the drawing state's size 472 Layer::State& editDraw(mDrawingState); 473 editDraw.requested_w = temp.requested_w; 474 editDraw.requested_h = temp.requested_h; 475 476 // record the new size, form this point on, when the client request 477 // a buffer, it'll get the new size. 478 setBufferSize(temp.requested_w, temp.requested_h); 479 480 ClientRef::Access sharedClient(mUserClientRef); 481 SharedBufferServer* lcblk(sharedClient.get()); 482 if (lcblk) { 483 // all buffers need reallocation 484 lcblk->reallocateAll(); 485 } 486 } else { 487 // record the new size 488 setBufferSize(temp.requested_w, temp.requested_h); 489 } 490 } 491 492 if (temp.sequence != front.sequence) { 493 if (temp.flags & ISurfaceComposer::eLayerHidden || temp.alpha == 0) { 494 // this surface is now hidden, so it shouldn't hold a freeze lock 495 // (it may never redraw, which is fine if it is hidden) 496 mFreezeLock.clear(); 497 } 498 } 499 500 return LayerBase::doTransaction(flags); 501} 502 503void Layer::setBufferSize(uint32_t w, uint32_t h) { 504 Mutex::Autolock _l(mLock); 505 mWidth = w; 506 mHeight = h; 507} 508 509bool Layer::isFixedSize() const { 510 Mutex::Autolock _l(mLock); 511 return mFixedSize; 512} 513 514// ---------------------------------------------------------------------------- 515// pageflip handling... 516// ---------------------------------------------------------------------------- 517 518void Layer::lockPageFlip(bool& recomputeVisibleRegions) 519{ 520 ClientRef::Access sharedClient(mUserClientRef); 521 SharedBufferServer* lcblk(sharedClient.get()); 522 if (!lcblk) { 523 // client died 524 recomputeVisibleRegions = true; 525 return; 526 } 527 528 ssize_t buf = lcblk->retireAndLock(); 529 if (buf == NOT_ENOUGH_DATA) { 530 // NOTE: This is not an error, it simply means there is nothing to 531 // retire. The buffer is locked because we will use it 532 // for composition later in the loop 533 return; 534 } 535 536 if (buf < NO_ERROR) { 537 LOGE("retireAndLock() buffer index (%d) out of range", int(buf)); 538 mPostedDirtyRegion.clear(); 539 return; 540 } 541 542 // we retired a buffer, which becomes the new front buffer 543 if (mBufferManager.setActiveBufferIndex(buf) < NO_ERROR) { 544 LOGE("retireAndLock() buffer index (%d) out of range", int(buf)); 545 mPostedDirtyRegion.clear(); 546 return; 547 } 548 549 sp<GraphicBuffer> newFrontBuffer(getBuffer(buf)); 550 if (newFrontBuffer != NULL) { 551 // get the dirty region 552 // compute the posted region 553 const Region dirty(lcblk->getDirtyRegion(buf)); 554 mPostedDirtyRegion = dirty.intersect( newFrontBuffer->getBounds() ); 555 556 // update the layer size and release freeze-lock 557 const Layer::State& front(drawingState()); 558 if (newFrontBuffer->getWidth() == front.requested_w && 559 newFrontBuffer->getHeight() == front.requested_h) 560 { 561 if ((front.w != front.requested_w) || 562 (front.h != front.requested_h)) 563 { 564 // Here we pretend the transaction happened by updating the 565 // current and drawing states. Drawing state is only accessed 566 // in this thread, no need to have it locked 567 Layer::State& editDraw(mDrawingState); 568 editDraw.w = editDraw.requested_w; 569 editDraw.h = editDraw.requested_h; 570 571 // We also need to update the current state so that we don't 572 // end-up doing too much work during the next transaction. 573 // NOTE: We actually don't need hold the transaction lock here 574 // because State::w and State::h are only accessed from 575 // this thread 576 Layer::State& editTemp(currentState()); 577 editTemp.w = editDraw.w; 578 editTemp.h = editDraw.h; 579 580 // recompute visible region 581 recomputeVisibleRegions = true; 582 } 583 584 // we now have the correct size, unfreeze the screen 585 mFreezeLock.clear(); 586 } 587 588 // get the crop region 589 setBufferCrop( lcblk->getCrop(buf) ); 590 591 // get the transformation 592 setBufferTransform( lcblk->getTransform(buf) ); 593 594 } else { 595 // this should not happen unless we ran out of memory while 596 // allocating the buffer. we're hoping that things will get back 597 // to normal the next time the app tries to draw into this buffer. 598 // meanwhile, pretend the screen didn't update. 599 mPostedDirtyRegion.clear(); 600 } 601 602 if (lcblk->getQueuedCount()) { 603 // signal an event if we have more buffers waiting 604 mFlinger->signalEvent(); 605 } 606 607 /* a buffer was posted, so we need to call reloadTexture(), which 608 * will update our internal data structures (eg: EGLImageKHR or 609 * texture names). we need to do this even if mPostedDirtyRegion is 610 * empty -- it's orthogonal to the fact that a new buffer was posted, 611 * for instance, a degenerate case could be that the user did an empty 612 * update but repainted the buffer with appropriate content (after a 613 * resize for instance). 614 */ 615 reloadTexture( mPostedDirtyRegion ); 616} 617 618void Layer::unlockPageFlip( 619 const Transform& planeTransform, Region& outDirtyRegion) 620{ 621 Region dirtyRegion(mPostedDirtyRegion); 622 if (!dirtyRegion.isEmpty()) { 623 mPostedDirtyRegion.clear(); 624 // The dirty region is given in the layer's coordinate space 625 // transform the dirty region by the surface's transformation 626 // and the global transformation. 627 const Layer::State& s(drawingState()); 628 const Transform tr(planeTransform * s.transform); 629 dirtyRegion = tr.transform(dirtyRegion); 630 631 // At this point, the dirty region is in screen space. 632 // Make sure it's constrained by the visible region (which 633 // is in screen space as well). 634 dirtyRegion.andSelf(visibleRegionScreen); 635 outDirtyRegion.orSelf(dirtyRegion); 636 } 637 if (visibleRegionScreen.isEmpty()) { 638 // an invisible layer should not hold a freeze-lock 639 // (because it may never be updated and therefore never release it) 640 mFreezeLock.clear(); 641 } 642} 643 644void Layer::finishPageFlip() 645{ 646 ClientRef::Access sharedClient(mUserClientRef); 647 SharedBufferServer* lcblk(sharedClient.get()); 648 if (lcblk) { 649 int buf = mBufferManager.getActiveBufferIndex(); 650 if (buf >= 0) { 651 status_t err = lcblk->unlock( buf ); 652 LOGE_IF(err!=NO_ERROR, 653 "layer %p, buffer=%d wasn't locked!", 654 this, buf); 655 } 656 } 657} 658 659 660void Layer::dump(String8& result, char* buffer, size_t SIZE) const 661{ 662 LayerBaseClient::dump(result, buffer, SIZE); 663 664 ClientRef::Access sharedClient(mUserClientRef); 665 SharedBufferServer* lcblk(sharedClient.get()); 666 uint32_t totalTime = 0; 667 if (lcblk) { 668 SharedBufferStack::Statistics stats = lcblk->getStats(); 669 totalTime= stats.totalTime; 670 result.append( lcblk->dump(" ") ); 671 } 672 673 sp<const GraphicBuffer> buf0(getBuffer(0)); 674 sp<const GraphicBuffer> buf1(getBuffer(1)); 675 uint32_t w0=0, h0=0, s0=0; 676 uint32_t w1=0, h1=0, s1=0; 677 if (buf0 != 0) { 678 w0 = buf0->getWidth(); 679 h0 = buf0->getHeight(); 680 s0 = buf0->getStride(); 681 } 682 if (buf1 != 0) { 683 w1 = buf1->getWidth(); 684 h1 = buf1->getHeight(); 685 s1 = buf1->getStride(); 686 } 687 snprintf(buffer, SIZE, 688 " " 689 "format=%2d, [%3ux%3u:%3u] [%3ux%3u:%3u]," 690 " freezeLock=%p, dq-q-time=%u us\n", 691 mFormat, w0, h0, s0, w1, h1, s1, 692 getFreezeLock().get(), totalTime); 693 694 result.append(buffer); 695} 696 697// --------------------------------------------------------------------------- 698 699Layer::ClientRef::ClientRef() 700 : mControlBlock(0), mToken(-1) { 701} 702 703Layer::ClientRef::~ClientRef() { 704} 705 706int32_t Layer::ClientRef::getToken() const { 707 Mutex::Autolock _l(mLock); 708 return mToken; 709} 710 711sp<UserClient> Layer::ClientRef::getClient() const { 712 Mutex::Autolock _l(mLock); 713 return mUserClient.promote(); 714} 715 716status_t Layer::ClientRef::setToken(const sp<UserClient>& uc, 717 const sp<SharedBufferServer>& sharedClient, int32_t token) { 718 Mutex::Autolock _l(mLock); 719 720 { // scope for strong mUserClient reference 721 sp<UserClient> userClient(mUserClient.promote()); 722 if (mUserClient != 0 && mControlBlock != 0) { 723 mControlBlock->setStatus(NO_INIT); 724 } 725 } 726 727 mUserClient = uc; 728 mToken = token; 729 mControlBlock = sharedClient; 730 return NO_ERROR; 731} 732 733sp<UserClient> Layer::ClientRef::getUserClientUnsafe() const { 734 return mUserClient.promote(); 735} 736 737// this class gives us access to SharedBufferServer safely 738// it makes sure the UserClient (and its associated shared memory) 739// won't go away while we're accessing it. 740Layer::ClientRef::Access::Access(const ClientRef& ref) 741 : mControlBlock(0) 742{ 743 Mutex::Autolock _l(ref.mLock); 744 mUserClientStrongRef = ref.mUserClient.promote(); 745 if (mUserClientStrongRef != 0) 746 mControlBlock = ref.mControlBlock; 747} 748 749Layer::ClientRef::Access::~Access() 750{ 751} 752 753// --------------------------------------------------------------------------- 754 755Layer::BufferManager::BufferManager(TextureManager& tm) 756 : mNumBuffers(NUM_BUFFERS), mTextureManager(tm), 757 mActiveBuffer(-1), mFailover(false) 758{ 759} 760 761Layer::BufferManager::~BufferManager() 762{ 763} 764 765status_t Layer::BufferManager::resize(size_t size) 766{ 767 Mutex::Autolock _l(mLock); 768 mNumBuffers = size; 769 return NO_ERROR; 770} 771 772// only for debugging 773sp<GraphicBuffer> Layer::BufferManager::getBuffer(size_t index) const { 774 return mBufferData[index].buffer; 775} 776 777status_t Layer::BufferManager::setActiveBufferIndex(size_t index) { 778 mActiveBuffer = index; 779 return NO_ERROR; 780} 781 782size_t Layer::BufferManager::getActiveBufferIndex() const { 783 return mActiveBuffer; 784} 785 786Texture Layer::BufferManager::getActiveTexture() const { 787 Texture res; 788 if (mFailover || mActiveBuffer<0) { 789 res = mFailoverTexture; 790 } else { 791 static_cast<Image&>(res) = mBufferData[mActiveBuffer].texture; 792 } 793 return res; 794} 795 796sp<GraphicBuffer> Layer::BufferManager::getActiveBuffer() const { 797 sp<GraphicBuffer> result; 798 const ssize_t activeBuffer = mActiveBuffer; 799 if (activeBuffer >= 0) { 800 BufferData const * const buffers = mBufferData; 801 Mutex::Autolock _l(mLock); 802 result = buffers[activeBuffer].buffer; 803 } 804 return result; 805} 806 807sp<GraphicBuffer> Layer::BufferManager::detachBuffer(size_t index) 808{ 809 BufferData* const buffers = mBufferData; 810 sp<GraphicBuffer> buffer; 811 Mutex::Autolock _l(mLock); 812 buffer = buffers[index].buffer; 813 buffers[index].buffer = 0; 814 return buffer; 815} 816 817status_t Layer::BufferManager::attachBuffer(size_t index, 818 const sp<GraphicBuffer>& buffer) 819{ 820 BufferData* const buffers = mBufferData; 821 Mutex::Autolock _l(mLock); 822 buffers[index].buffer = buffer; 823 buffers[index].texture.dirty = true; 824 return NO_ERROR; 825} 826 827status_t Layer::BufferManager::destroy(EGLDisplay dpy) 828{ 829 BufferData* const buffers = mBufferData; 830 size_t num; 831 { // scope for the lock 832 Mutex::Autolock _l(mLock); 833 num = mNumBuffers; 834 for (size_t i=0 ; i<num ; i++) { 835 buffers[i].buffer = 0; 836 } 837 } 838 for (size_t i=0 ; i<num ; i++) { 839 destroyTexture(&buffers[i].texture, dpy); 840 } 841 destroyTexture(&mFailoverTexture, dpy); 842 return NO_ERROR; 843} 844 845status_t Layer::BufferManager::initEglImage(EGLDisplay dpy, 846 const sp<GraphicBuffer>& buffer) 847{ 848 status_t err = NO_INIT; 849 ssize_t index = mActiveBuffer; 850 if (index >= 0) { 851 if (!mFailover) { 852 Image& texture(mBufferData[index].texture); 853 err = mTextureManager.initEglImage(&texture, dpy, buffer); 854 // if EGLImage fails, we switch to regular texture mode, and we 855 // free all resources associated with using EGLImages. 856 if (err == NO_ERROR) { 857 mFailover = false; 858 destroyTexture(&mFailoverTexture, dpy); 859 } else { 860 mFailover = true; 861 const size_t num = mNumBuffers; 862 for (size_t i=0 ; i<num ; i++) { 863 destroyTexture(&mBufferData[i].texture, dpy); 864 } 865 } 866 } else { 867 // we failed once, don't try again 868 err = BAD_VALUE; 869 } 870 } 871 return err; 872} 873 874status_t Layer::BufferManager::loadTexture( 875 const Region& dirty, const GGLSurface& t) 876{ 877 return mTextureManager.loadTexture(&mFailoverTexture, dirty, t); 878} 879 880status_t Layer::BufferManager::destroyTexture(Image* tex, EGLDisplay dpy) 881{ 882 if (tex->name != -1U) { 883 glDeleteTextures(1, &tex->name); 884 tex->name = -1U; 885 } 886 if (tex->image != EGL_NO_IMAGE_KHR) { 887 eglDestroyImageKHR(dpy, tex->image); 888 tex->image = EGL_NO_IMAGE_KHR; 889 } 890 return NO_ERROR; 891} 892 893// --------------------------------------------------------------------------- 894 895Layer::SurfaceLayer::SurfaceLayer(const sp<SurfaceFlinger>& flinger, 896 const sp<Layer>& owner) 897 : Surface(flinger, owner->getIdentity(), owner) 898{ 899} 900 901Layer::SurfaceLayer::~SurfaceLayer() 902{ 903} 904 905sp<GraphicBuffer> Layer::SurfaceLayer::requestBuffer(int index, 906 uint32_t w, uint32_t h, uint32_t format, uint32_t usage) 907{ 908 sp<GraphicBuffer> buffer; 909 sp<Layer> owner(getOwner()); 910 if (owner != 0) { 911 /* 912 * requestBuffer() cannot be called from the main thread 913 * as it could cause a dead-lock, since it may have to wait 914 * on conditions updated my the main thread. 915 */ 916 buffer = owner->requestBuffer(index, w, h, format, usage); 917 } 918 return buffer; 919} 920 921status_t Layer::SurfaceLayer::setBufferCount(int bufferCount) 922{ 923 status_t err = DEAD_OBJECT; 924 sp<Layer> owner(getOwner()); 925 if (owner != 0) { 926 /* 927 * setBufferCount() cannot be called from the main thread 928 * as it could cause a dead-lock, since it may have to wait 929 * on conditions updated my the main thread. 930 */ 931 err = owner->setBufferCount(bufferCount); 932 } 933 return err; 934} 935 936// --------------------------------------------------------------------------- 937 938 939}; // namespace android 940